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首页> 外文会议>7th Biennial Conference on Engineering Systems Design and Analysis 2004(ESDA 2004) vol.3: Design Engineering; Maintenance Engineering; Manufacturing Engineering; ... >COMPARISON OF FINE AND CONVENTIONAL BLANKING BASED ON DUCTILE FRACTURE CRITERIA
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COMPARISON OF FINE AND CONVENTIONAL BLANKING BASED ON DUCTILE FRACTURE CRITERIA

机译：基于韧性断裂准则的精细冲裁和常规冲裁的比较

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摘要

A comparison between fine and conventional blanking is carried out in this paper. In the fine blanking process, V-ring indentation is applied to create hydrostatic pressure and prevent premature fracture in an undesired direction. Furthermore, a small clearance between the punch and die is employed along with a counterforce punch that causes concentrated strain in the sheared band region. A fracture mechanics oriented finite element procedure has been employed in this research work in order to obtain the fracture path. The fracture path is found according to the stress and strain histories which are calculated in each element. The numerical results have shown that the sheared edge quality in the blanking process is strongly influenced by the fracture path. In fine blanking, there are various parameters affecting the sheared edge quality and dimensional accuracy. The finite element calculation is carried out for an axisymmetric model. The commercial finite element code ABAQUS V6.2 is employed along with a controlling program that is written in Visual BASIC.
机译：本文对精密冲裁和常规冲裁进行了比较。在精细的落料过程中，使用V形环压痕以产生静水压力并防止沿不希望的方向过早破裂。此外，在冲头和冲模之间使用很小的间隙，同时使用反作用力冲头，在剪切带区域内引起集中应变。这项研究工作采用了以断裂力学为导向的有限元程序，以获得断裂路径。根据在每个单元中计算出的应力和应变历史找到断裂路径。数值结果表明，落料过程中的剪切边缘质量受断裂路径的强烈影响。在精细落料中，有各种参数会影响剪切边缘的质量和尺寸精度。对轴对称模型进行了有限元计算。商业有限元代码ABAQUS V6.2与用Visual BASIC编写的控制程序一起使用。

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